Outage report · Major outage
Klaviyo outage on May 5, 2026
Klaviyo Service Disruption
What happened
Klaviyo reported a major outage starting May 5, 2026, 21:24 UTC, affecting Klaviyo App, Email Sending, Email Sending, Sign-up Forms, Email Deliverability, Lists, Segments, Customer Agent and 7 more. It was marked resolved at May 7, 2026, 23:02 UTC.
- The incident lasted 2d 1h from first report to resolution.
- It was the longest significant outage Klaviyo reported in the 12 months up to it.
- Klaviyo had reported 1 other partial or major outage in the 90 days before it.
- 8 other vendors we track reported a significant incident within 12 hours of it.
Latest update from Klaviyo
All Klaviyo services have been fully restored and final recovery work is complete. We appreciate your patience throughout this incident. This incident has been resolved.
What our independent monitoring saw
Our independent monitoring of Klaviyo started after this incident, so this report is based on Klaviyo's status page.
Other outages around the same time
Significant incidents other vendors reported within 12 hours of this one.
Klaviyo's overall reliability
Klaviyo has a reliability score of 62.2/100, with 99.26% effective uptime and 13 incidents over the last 90 days.
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